Across
1
Tissue that contracts for movement
4
Force that attracts objects together
5
Solid with repeating atomic pattern
6
Magnetic metallic element
7
Gas essential for breathing
Down
1
Naturally occurring inorganic solid
2
Substance with pH above 7
3
Preserved remains of ancient life
8
Unit of energy
9
Path of a planet around the sun
10
Center of an atom or cell